The next one will be in April. Anybody who would want to travel for it should be making plans & obtaining supplies now, or even sooner. A video I just saw on it said the hotels along the path are already just about completely taken but campgrounds might not be. The next one will enter this country in Texas, go over the Ozarks, almost perfectly cover both Lakes Erie and Ontario, and straddle the border with Canada from New York to Maine.
Last time, I drove from Pennsylvania to the Tennessee & North Carolina border, while my family in Kansas City just stayed home and let it come to them. This time, I live in its path. I wouldn't need to go anywhere but right outside my door, but have considered possible more-scenic destinations up to a few driving-hours away. I live less than a 20-minute drive away from Niagara Falls, and I'm sure there will be huge gatherings on both sides of the border there, well beyond the local parking capacity. I also notice that Poplar Bluff, Missouri, a place I lived at for several weeks long ago and have some good memories from, will be dead-center on the path this time, but my favorite sites from around there are forested, and an open field would work better for this.
The southern & western end of that path through the USA is less likely to be clouded than the northern & eastern end, in general. But, of course, some storms do take a southern track, hitting down there and missing up here, so there won't be a way to be sure until a few days before, so it's best to have two possible destinations to pick between on short notice.